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Legacy BIOS

This menu configures system UEFI firmware execution environment preferences for supporting legacy OS and legacy Option ROM.

Table 1. Legacy BIOS
ItemOptionsDescription
Legacy BIOS

  • Enabled (Default)

  • Disabled

Enable or disable the system UEFI firmware execution environment for supporting legacy OS and legacy Option ROM.

Rehook INT 19h

  • Enabled

  • Disabled (Default)

[Enable] prevents devices from taking control of the boot process.

Non-Onboard PXE

  • Enabled (Default)

  • Disabled

Enable/Disable legacy PXE boot for installed network adapters.

Legacy BIOS is disabled due to secure boot is enabled.

Note
This feature appears only when Secure Boot is enabled.